[ Version ( since = "1.14" ) ]
public static void install_properties (ObjectClass oclass, int last_prop_id)
This helper shall be used by classes implementing the Overlay interface that want the render rectangle to be controllable using properties.
This helper will install "render-rectangle" property into the class.
| oclass |
The class on which the properties will be installed |
| last_prop_id |
The first free property ID to use |